J/A+A/683/A33ivo://CDS.VizieR/J/A+A/683/A33doi:10.26093/cds/vizier.36830033CDSGolovin A.Reffert S.Vani A.Bastian U.Jordan S.Just A.2025-04-16T20:01:14Z2024-03-15T09:18:44ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frwhite-dwarf-starsvisible-astronomyA volume-complete sample of white dwarfs is essential for statistical studies of the white dwarf population. The sample of nearby white dwarfs is the only one that allows the faint end of the luminosity function to be probed and thus is the only one that covers the entire range of white dwarf ages. However, due to their intrinsic faintness, even nearby white dwarfs are difficult to identify. Our work focuses on improving the completeness and purity of the white dwarf census within 50pc of the Sun. To accomplish this, we used Gaia Data Release 3 (Gaia DR3) to identify and characterise new and previously overlooked white dwarfs in the solar neighbourhood. We also identify objects with spurious astrometric solutions in Gaia DR3 but claimed as high-confidence white dwarfs in the Gaia Catalogue of White Dwarfs (GCWD21) by Gentile Fusillo et al. (2021MNRAS.508.3877G, Cat. J/MNRAS/508/3877). Based on the astrometry and photometry in Gaia DR3, we identified new nearby white dwarfs and validated those that had been missed from recent white dwarf catalogues despite being previously documented. To ensure the reliability of their astrometric solutions, we used a cut on just two parameters from Gaia DR3: the amplitude of the image parameter determination goodness-of-fit and the parallax-over-error ratio. In addition, we imposed photometric signal-to-noise requirements to ensure the reliable identification of white dwarfs when using the colour-magnitude diagram. We have identified nine previously unreported white dwarfs within the local population of 50pc, and validated 21 previously reported white dwarfs missing from the GCWD21 and other recent volume-limited white dwarf samples. A few of these objects belong to the rare class of ultra-cool white dwarfs. Four white dwarfs in our sample have an effective temperature of Teff<=4000K within the 1{sigma} interval, and two of them have an absolute magnitude of M_G_>16.0mag. The identified white dwarfs are predominantly located in crowded fields, such as near the Galactic plane or in the foreground of the Large Magellanic Cloud. We also find that 20 of these white dwarfs have common proper motion companions with angular separations ranging from 1.1" to 7.1" and brightness differences between the components of up to 9.8 magnitudes. One of these systems is a triple system consisting of a white dwarf and two K dwarfs, while another is a double white dwarf system. The identified white dwarfs represent a 1.3% improvement in the completeness of the 50pc sample, resulting in a new total of 2265 known white dwarfs located within 50pc of the Sun. We have identified 103 contaminants among the 2338 high-confidence white dwarfs in the 50pc subsample of the GCWD21 and have found that their astrometric solutions in Gaia DR3 are spurious, improving the purity by 4.4%.2024A&A...683A..33Ghttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/683/A33CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/355 : Gaia DR3 Part 1. Main source (Gaia Coll., 2022)J/MNRAS/482/4570 : Gaia DR2 white dwarf candidates (Gentile Fusillo+, 2019)J/A+A/649/A6 : Gaia Catalogue of Nearby Stars - GCNS (Gaia Coll., 2021)J/MNRAS/518/3055 : Gaia white dwarfs within 40pc. III (O'Brien+, 2023)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/683/A33https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/683/A33http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/683/A33https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/683/A33https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/683/A33http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/683/A33GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/683/A33/table13 (New and validated white dwarfs within 50pc (table1 and table3))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/683/A33/table13?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/683/A33/table13?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/683/A33/table13?GETtext/xml+votable180.050000true232.34488-35.872260.0055555555555555566/1461 4445 9404 9629 13777 14366 14765 18002 18838 20118 21197 24605 29206 30659 31749 33029 33049 33139 34371 38820 42326 42729 42758 42914 43083 43201 43480 46654 47362https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/683/A33?format=asciiOpticaldefaultJ/A+A/683/A33/table13New and validated white dwarfs within 50pc (table1 and table3)SimbadSimbad column added by the CDSmeta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintCPMindicates CPM companions data in table2meta.ref.urlcharGaiaDR3Source identifier in Gaia DR3 (source_id)meta.id;meta.mainprimaryRA_ICRSRight ascension (ICRS) at Ep=2016.0degpos.eq.ra;meta.mainDE_ICRSDeclination (ICRS) at Ep=2016.0degpos.eq.dec;meta.mainplxAbsolute trigonometric parallaxmaspos.parallax.trigfloate_plxError in parallaxmasstat.error;pos.parallaxfloatpmRAProper motion in right ascensionmas/yrpos.pm;pos.eq.radoublee_pmRAError in pmRAmas/yrstat.error;pos.pm;pos.eq.rafloatpmDEProper motion in declinationmas/yrpos.pm;pos.eq.decdoublee_pmDEError in pmDEmas/yrstat.error;pos.pm;pos.eq.decfloatGmagG band mean magnitudemagphot.mag;em.optdoublee_GmagError in Gmagmagstat.error;phot.magdoubleBP-RPBP-RP colourmagphot.color;em.opt.B;em.opt.Rfloate_BP-RPError in BP-RPmagstat.errorfloatPS1? PS1 identifiermeta.idnullableRefReference where the object has been reported as a white dwarf (1)meta.ref;pos.framecharTeffDAEffective temperature (DA solution)Kphys.temperature.effectiveinte_TeffDAError in T_eff_DAKstat.errorintloggDASurface gravity (DA solution)log(cm.s**-2)phys.gravityfloate_loggDAError in log_g_DAlog(cm.s**-2)stat.errorfloatMDAMass (DA solution)solMassphys.massfloate_MDAError in M_DAsolMassstat.errorfloatMbolDABolometric magnitude (DA solution)magphot.mag.bolfloate_MbolDAError in M_bol_DAmagstat.errorfloatTeffDBEffective temperature (DB solution)Kphys.temperature.effectiveinte_TeffDBError in T_eff_DBKstat.errorintloggDBSurface gravity (DB solution)log(cm.s**-2)phys.gravityfloate_loggDBError in log_g_DBlog(cm.s**-2)stat.errorfloatMDBMass (DB solution)solMassphys.massfloate_MDBError in M_DBsolMassstat.errorfloatMbolDBBolometric magnitude (DB solution)magphot.mag.bolfloate_MbolDBError in M_bol_DBmagstat.errorfloatJ/A+A/683/A33/table2CPM companions to the white dwarfs identified in this workrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGaiaDR3Source identifier in Gaia DR3 (source_id) of the white dwarfmeta.id;meta.mainCPMSource identifier in Gaia DR3 (source_id) of the CPM companionmeta.idplxAbsolute trigonometric parallax of the CPM companionmaspos.parallax.trigfloate_plxError in parallaxmasstat.error;pos.parallaxfloatpmRAProper motion in right ascension of the CPM companionmas/yrpos.pm;pos.eq.radoublee_pmRAError in pmRAmas/yrstat.error;pos.pm;pos.eq.rafloatpmDEProper motion in declination of the CPM companionmas/yrpos.pm;pos.eq.decdoublee_pmDEError in pmDEmas/yrstat.error;pos.pm;pos.eq.decfloatGmagG band mean magnitude of the CPM companionmagphot.mag;em.optfloatBP-RPBP-RP colour of the CPM companionmagphot.color;em.opt.B;em.opt.RfloatSpTypeSpectral type of the CPM companionsrc.spTypecharrhoAngular separationarcsecpos.angDistancefloatsProjected separationAUpos.angDistancefloat